Tooltron

#!/bin/bash

stty 9600 raw < /dev/ttyUSB0

#-echo -echok -icrnl -ixon -icanon -opost -onlcr 

xxd -r readhex > /dev/ttyUSB0

sleep 0.1

response=`head -c 5 /dev/ttyUSB0`

ok="\001"

if [ ${response:0:1} = $ok ]; then

  echo -n ${response:1} | xxd

else

  # if it failed, it hangs waiting for more characters anyway, so this never

  # happens unless the serial port is missing :(

  echo Failed.

fi